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The anterior thoracic nerve from the C5 to C8 roots innervates the pectoralis major and minor, and the thoracodorsal nerve from C6 to C8 roots innervates the latissimus dorsi muscle. The axillary nerve is formed by fibers of the C5 to C6 roots which go through the posterior cord of the plexus and innervate the deltoid and teres minor muscles, as well as part of the skin of the lateral shoulder.
Motor innervation. The nerve innervates most of the flexor muscles of the forearm with the exception of the flexor carpi ulnaris and the medial two digits of the flexor digitorum profundus, which are supplied by the ulnar nerve. Unbranched, the median nerve supplies the following muscles: 1  Pronator teres.he median nerve provides sensory innervation to the skin of the palmar side of the thumb, index, and middle fingers and the radial half of the ring finger. The radial side of the palm is innervated by the palmar cutaneous branch of the median nerve.